<!DOCTYPE html>
<html>
<script>
    console.log('test')
</script>
<head>
    <script src="../..//release/extension.website.user.js?x=1"></script>

    <meta charset="utf-8">
    <title>Website Test Page 1</title>
</head>

<body>
    <video style="width: 100%;height: 100%;" autoplay controls>
        <source src="./1.mp4" type="video/mp4">
    </video>
    <script>
        console.log('html');
        console.log(document.querySelector("video").canPlayType('application/x-mpegURL'))
    </script>
</body>

</html>